Electrostats question
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[Post New] 24 Jan 2012 19:02:14 IST
   Subject: Electrostats question
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Gargee Mehta (155)


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 Two unlike charges separated by a distance of 1m attract each other with a force 0.108N. If the charges are in the ratio 1:3, the weak charge is?

A. 2 micro C

B. 4 micro C

C. 6 miro C

D. 5 microC
    
[Post New] 23 Feb 2012 07:40:12 IST
   Subject: Electrostats question
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Krishna Gopal Singh (4603)

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Let two charges have a magnitude of q and 3q. Distance between them is 1 m.So 9*10^9*3q^2/1 = .108This gives q^2 = 4*10^-12Or q = 2*10^-6 = 2 micro C. So answer (A) is right.
 
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[Post New] 23 Feb 2012 21:27:17 IST
   Subject: Electrostats question
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Gargee Mehta (155)


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 Actually the ans is b as given in the ans key. but i guess its wrong as even i'm getting a...

thank you
 
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